Heineich pfanne



(No Model.)

I I i A METHOD OF MANUFACTURING VARNISH AND APPARATUS THEREFOR H.PFANNE.

No. 501,578. Patented July 18. 1893.

UNITED STATES PATENT OFFICE.

HEINRICH PFANNE, OF RIXDORF, NEAR BERLIN, GERMANY.

METHOD OF MANUFACTURING VARNISH AND APPARATUS THEREFOR.

SPECIFICATION forming part of Letters Patent No. 501,578, dated July 18, 1893.

Application filed August 29, 1892. Serial No. 444,493. (No model.)

mixtures or impurities is according to this invention produced by the following process. Linseed oil which has been purified in a proper manner, is thoroughly mixed and agitated with sulphuric acid and water and subjected for about two to three hours to the passage and action of an electric current so that the oxygen produced in the nascentstate by the passage of the current converts the oil into varnish. Apparatus for carrying this process into effect is illustrated in the accompanying drawings in which-- Figure 1 is a sectional elevation of the whole apparatus; Fig. 2 a front elevation; Fig. 3 a side elevation and Fig. 4 is a plan of a belt fork used therein. Fig. 5 is a plan of part of the framework near said belt fork.

A is a vat made of any suitable material with a removable cover.

A is a framing of suitable form and construction to carry the apparatus. v Bis a central vertical shaft in the vat A supported at its lower end on an adjustable pivot bearing 0 and at its upper end in a suitable collar bearing over the lid of the vat.

H is a beveled frictional wheel and H is also a beveled frictional wheel on the shaft F. These wheels may be replaced by toothed beveled wheels. By them the motion of the shaft F is transferred to shaft B. The shaft F carries three pulleys G G G close together, the middle one being a loose pulley and the other two fixed.

On the parallel driving shaft F is a broad pulley G fixed thereon which is geared with the pulleys G G G by two belts I I one of which isstraight, the other crossed. Sliding on the bar J is the belt fork J engaging both belts I I and having also the two lugs J J between which one arm of the lever K engages. This lever K is pivoted on the pin K (Fig. 5) and has on its upper arm aweight K which holds it inclined to the one side or the other against the respective stop K or K (Fig. 5) and so throws the belts onto the two pulleys G G or onto the two G G'; Cords M M passing over rollers 7" r r 1' connect the lever K to a lever L. V

On the shaft F is the worm O which gears with the worm wheel N having the pin adapted to strike and deflect the lever L.

The parts being in position as in the drawing, and power applied to revolve shaftingF, the shaft F is revolved through pulley G on which the straight belt is running, the loose belt moves idly with the loose pulley G. Themovement continues until the pin 11 rocks thelever L. This draws over the lever K which falls to the Opposite side moving the belt fork J and carrying the crossed belt onto the pulley G and the straight belt onto the loose pulley G. The movement is then in the opposite direction until the pin n moving back to its first position, again strikes the lever L and brings the latter again into its former position. The speeds and proportions are preferably such that the shaft B is revolved at the rate of about fifty to sixty turns per minute and reversed every minute.

The shaft B is provided with a number of radiating armsD of metal and on these arms project in all directions metal wires forming brushes cl d. On the inside of the vat A are metal plates preferably two in number E E of zinc or other metal covering the whole surface from bottom to top but not touching each other. To these plates are connected terminals e e which are both connected with one terminal of a dynamo electric machine or other source of electric current. The other terminal of this machine is connected to the contact spring Z which rises on the contactcollar Z on the shaft B.

To use this apparatus, the vat is filled with ICC 3. A method of producing varnish in which an electric current is caused to traverse a mixture of linseed oil and acidulated water kept in constant rotary agitation periodically reversed.

4:. For the production of varnish from linseed oil under the action of electric current,

apparatus comprising in combination a vat having its sides lined with metal plate, a rotary agitating shaft therein, metallic brushes on said shaft, a periodical reversing gear for said shaft and a producer of electric current of which the terminals are connected to said plate linings and agitating shaft respectively. In witness whereof I have signed this speci Yfication in presence of two witnesses.

HEINRICH PFANNE. lVitnesses:

W. H. EDWARDS, W. HA-UPT. 

